feat(qodana): add completion plugin (#11813)

plugins/qodana/README.md

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+# JetBrains Qodana CLI plugin
+
+This plugin adds completion for the [JetBrains Qodana CLI](https://github.com/JetBrains/qodana-cli).
+
+To use it, add `qodana` to the plugins array in your zshrc file:
+
+```zsh
+plugins=(... qodana)
+```
+
+This plugin does not add any aliases.
+
+## Cache
+
+This plugin caches the completion script and is automatically updated when the
+plugin is loaded, which is usually when you start up a new terminal emulator.
+
+The cache is stored at:
+
+- `$ZSH_CACHE_DIR/completions/_qodana` completions script